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minus method

Minus is a method that can be called within an access path. Minus is performed as an operation between the collection passed to the operation (preceding subpath) and one collections passed as argument. The minus operation is performed by key or by object identity. Depending on the types of the collection included in the operation the result might become typed (when the collections have the same type), untyped or weak-typed.

Generalisations:  set methodset operation

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